//////////////////////////////////////////////////////////////////////////
//
//  Copyright (c) 2020, Cinesite VFX Ltd. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//      * Redistributions of source code must retain the above
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//        disclaimer.
//
//      * Redistributions in binary form must reproduce the above
//        copyright notice, this list of conditions and the following
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//      * Neither the name of John Haddon nor the names of
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//////////////////////////////////////////////////////////////////////////

#pragma once

#include "Gaffer/GraphComponent.h"
#include "Gaffer/Metadata.h"

namespace Gaffer
{

namespace MetadataAlgo
{

template<typename Predicate>
void copyIf( const GraphComponent *from, GraphComponent *to, Predicate &&predicate, bool persistent )
{
	const std::vector<IECore::InternedString> names = Metadata::registeredValues( from );
	for( const auto &name : names )
	{
		if( predicate( from, const_cast<const GraphComponent *>( to ), name ) )
		{
			Metadata::registerValue( to, name, Metadata::value<IECore::Data>( from, name ), persistent );
		}
	}

	for( const auto &child : from->children() )
	{
		if( auto childTo = to->getChild( child->getName() ) )
		{
			copyIf( child.get(), childTo, predicate, persistent );
		}
	}
}

} // namespace MetadataAlgo

} // namespace Gaffer
